Error 13 from 7.2 to 7.6

Hello,

I am experiencing Error 13 after upgrading our MAS 500 from 7.2.20 to 7.60.6. Strangely, error 13 didn't present itself during testing. The error appears when users are processing invoices for payment after clicking the proceed button. The messages reads

Module:     Company: My company's name AppName: Select for Payment

Error 13 occurred at frmSelectVouchers in Procedure HandleToolbarClick

Type mismatch

This application will now close.